fix latent compare-debug problem in cprop

Alexandre Oliva aoliva@redhat.com
Mon Jun 6 06:33:00 GMT 2011


On Jun  4, 2011, Steven Bosscher <stevenb.gcc@gmail.com> wrote:

> I'm curious, though: What CFG changes or other transformations are
> performed without this patch? It could be a sign of a missed
> optimization before CPROP. Have you looked at that too?

IIRC the transformation that was possible but that hadn't been performed
yet involved merging two blocks (I remember block numbering was off
after cprop, and that there were cfgoptimize notes in its -g dumps, but
not in the non-g dumps), but I didn't look any further than that.

-- 
Alexandre Oliva, freedom fighter    http://FSFLA.org/~lxoliva/
You must be the change you wish to see in the world. -- Gandhi
Be Free! -- http://FSFLA.org/   FSF Latin America board member
Free Software Evangelist      Red Hat Brazil Compiler Engineer



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